Armor piercing 270 WIN

I bought one of those solid steel plate spinning targets about a week ago. It's 3/8 of an inch thick. The package said it was good for up to 30-06, but not closer than 200 yards. So I thought I would try my 270 Win at 200 yards. My first shot was a handloaded 130 grain Hornady spire point. It pulled the target out of the ground and when I inspected it, it had a crater about half way through. Next I tried a factory Hornady 130 grain Superformance SST. Whack!!! I went down to inspect the still standing target. It had a hole clean through that measured 1/2 inch in diameter. Now that is superformance!